[PATCH] fs/vfs/security: pass last path component to LSM on inode creation

[Al Viro]

On Wed, Dec 08, 2010 at 02:45:27PM -0500, Eric Paris wrote:
> SELinux would like to implement a new labeling behavior of newly created
> inodes.  We currently label new inodes based on the parent and the creating
> process.  This new behavior would also take into account the name of the
> new object when deciding the new label.  This is not the (supposed) full path,
> just the last component of the path.
> 
> This is very useful because creating /etc/shadow is different than creating
> /etc/passwd but the kernel hooks are unable to differentiate these
> operations.  We currently require that userspace realize it is doing some
> difficult operation like that and than userspace jumps through SELinux hoops
> to get things set up correctly.  This patch does not implement new
> behavior, that is obviously contained in a seperate SELinux patch, but it
> does pass the needed name down to the correct LSM hook.  If no such name
> exists it is fine to pass NULL.

-ETOOFUCKINGUGLY...